메타데이터
| 항목 |
값 |
| Designation |
P/2022 R4 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-07-10T09:08:14.683200Z |
| Orbit solution date (soln_date, UTC) |
2022-12-08T23:43:20Z |
| Obs used |
44 |
| NEO |
- |
| M1 |
18.500 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-09-02T13:50:22.128000Z |
| Discovery magnitude (MPC) |
21.38 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2022-10-02.0000000 |
| e |
0.49035777 |
| q (au) |
1.955577 |
| a (au) |
3.837156 |
| i (deg) |
21.021791 |
| Ω (om, deg) |
176.624038 |
| ω (w, deg) |
197.431178 |
| M (ma, deg) |
10.964688 |
밝기
산란 + 전체 선형
$$
M_a = (18.847 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.847 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
12:44:54.24 |
+03:22:46.8 |
HIP 62147 |
9.70 |
| 2026-07-29 12:00 |
12:45:07.12 |
+03:21:21.3 |
HIP 62237 |
10.70 |
| 2026-07-30 00:00 |
12:45:20.11 |
+03:19:55.3 |
HIP 62237 |
11.55 |
| 2026-07-30 12:00 |
12:45:33.20 |
+03:18:28.7 |
HIP 62237 |
13.33 |
| 2026-07-31 00:00 |
12:45:46.39 |
+03:17:01.6 |
HIP 62237 |
15.76 |
| 2026-07-31 12:00 |
12:45:59.69 |
+03:15:34.0 |
HIP 62237 |
18.59 |
| 2026-08-01 00:00 |
12:46:13.09 |
+03:14:05.9 |
HIP 62237 |
21.68 |
| 2026-08-01 12:00 |
12:46:26.60 |
+03:12:37.3 |
HIP 62237 |
24.94 |
| 2026-08-02 00:00 |
12:46:40.20 |
+03:11:08.1 |
HIP 62466 |
26.46 |
| 2026-08-02 12:00 |
12:46:53.91 |
+03:09:38.5 |
HIP 62466 |
24.88 |
| 2026-08-03 00:00 |
12:47:07.72 |
+03:08:08.4 |
HIP 62466 |
23.78 |
| 2026-08-03 12:00 |
12:47:21.63 |
+03:06:37.9 |
HIP 62466 |
23.24 |
| 2026-08-04 00:00 |
12:47:35.64 |
+03:05:06.8 |
HIP 62466 |
23.31 |
| 2026-08-04 12:00 |
12:47:49.75 |
+03:03:35.3 |
HIP 62466 |
24.00 |
| 2026-08-05 00:00 |
12:48:03.96 |
+03:02:03.3 |
HIP 62466 |
25.27 |
| 2026-08-05 12:00 |
12:48:18.27 |
+03:00:30.8 |
HIP 62466 |
27.04 |
| 2026-08-06 00:00 |
12:48:32.67 |
+02:58:57.9 |
HIP 62466 |
29.24 |
| 2026-08-06 12:00 |
12:48:47.18 |
+02:57:24.5 |
HIP 62466 |
31.79 |
| 2026-08-07 00:00 |
12:49:01.77 |
+02:55:50.7 |
HIP 62466 |
34.61 |
| 2026-08-07 12:00 |
12:49:16.47 |
+02:54:16.5 |
HIP 62757 |
36.23 |
| 2026-08-08 00:00 |
12:49:31.26 |
+02:52:41.8 |
HIP 62757 |
33.15 |
| 2026-08-08 12:00 |
12:49:46.14 |
+02:51:06.7 |
HIP 62757 |
30.26 |
| 2026-08-09 00:00 |
12:50:01.12 |
+02:49:31.1 |
HIP 62757 |
27.65 |
| 2026-08-09 12:00 |
12:50:16.19 |
+02:47:55.2 |
HIP 62757 |
25.42 |
| 2026-08-10 00:00 |
12:50:31.36 |
+02:46:18.8 |
HIP 62757 |
23.66 |
| 2026-08-10 12:00 |
12:50:46.61 |
+02:44:42.0 |
HIP 62757 |
22.53 |
| 2026-08-11 00:00 |
12:51:01.96 |
+02:43:04.9 |
HIP 62757 |
22.12 |
| 2026-08-11 12:00 |
12:51:17.40 |
+02:41:27.3 |
HIP 62757 |
22.48 |
| 2026-08-12 00:00 |
12:51:32.93 |
+02:39:49.3 |
HIP 62757 |
23.60 |
| 2026-08-12 12:00 |
12:51:48.55 |
+02:38:11.0 |
HIP 62757 |
25.39 |
| 2026-08-13 00:00 |
12:52:04.26 |
+02:36:32.3 |
HIP 62924 |
24.77 |
| 2026-08-13 12:00 |
12:52:20.06 |
+02:34:53.2 |
HIP 62924 |
21.18 |
| 2026-08-14 00:00 |
12:52:35.94 |
+02:33:13.8 |
HIP 62924 |
17.89 |
| 2026-08-14 12:00 |
12:52:51.92 |
+02:31:34.0 |
HIP 62924 |
15.09 |
| 2026-08-15 00:00 |
12:53:07.97 |
+02:29:53.8 |
HIP 62924 |
13.13 |
| 2026-08-15 12:00 |
12:53:24.12 |
+02:28:13.4 |
HIP 62924 |
12.44 |
| 2026-08-16 00:00 |
12:53:40.35 |
+02:26:32.5 |
HIP 62924 |
13.25 |
| 2026-08-16 12:00 |
12:53:56.66 |
+02:24:51.4 |
HIP 62966 |
13.62 |
| 2026-08-17 00:00 |
12:54:13.05 |
+02:23:09.9 |
HIP 63037 |
12.81 |
| 2026-08-17 12:00 |
12:54:29.53 |
+02:21:28.1 |
HIP 63037 |
8.42 |
| 2026-08-18 00:00 |
12:54:46.09 |
+02:19:46.0 |
HIP 63037 |
4.15 |
| 2026-08-18 12:00 |
12:55:02.73 |
+02:18:03.6 |
HIP 63037 |
1.87 |
| 2026-08-19 00:00 |
12:55:19.45 |
+02:16:20.9 |
HIP 63037 |
5.51 |